Item nearest the viewport center.
Whether the nearest item is aligned with the viewport.
Nearest item's offset from its settled position, in pixels.
Nearest item's offset normalized by viewport size.
Continuous item position. For example, 1.5 is halfway from item 1 to item 2.
Clamped scroll offset along the deck's active axis, in pixels.
Current viewport size along the deck's active axis, in pixels.
Direction of the latest observed movement.